5265300112 Plug-in Model IO 1-01(JO 1-01),5265300712 Plug-In Card PS 3-01,5085301912 Plug-In Board RZ 1-01,5085301912 Governor Aux. Card RZ 1-01,These cards are Parts of Electronic Control System for MTU396 Series Diesel Engines . These control parts are all from MTU.